Horner Engineering India Pvt. Ltd. Supplies Traditional Analog Input Modules with +/-10 Voltage Signals. Horner Engineering India Pvt. Ltd. Is the manufacturer of industrial automation and custom solutions for the global market. Traditional Analog Input Modules with +/-10 Voltage Signals convert the voltage or current input signals into digital values, which are placed directly into the %AI table of the PLC CPU. Traditional Analog Input Modules with +/-10 Voltage Signals has high degree of isolation, channel-to-channel and channel-to-ground. Four and eight channel versions are offered. The four channel module is available for either current or voltage. 14-bit resolution is standard but a 16-bit module, the ADC816 is offered as well.